Spread popped corn and peanuts in a large shallow sheet pan. Keep warm in 250° oven.,Combine brown sugar, corn syrup, butter and salt in a heavy pan. Place on medium heat.,Bring to a boil and boil for 5 minutes.,Remove from heat and stir in baking soda (syrup will form).,Pour syrup over popped corn and peanuts in a fine stream.,______,Return to oven and bake for 45 minutes to 1 hour, stirring every 15 minutes.,Cool and serve or store in an airtight container.,Keep in a cool place, but very good served warm.